An NBC investigative internet story that has upended the administration’s oft-repeated promise that Americans will be able to keep their health care plan under Obamacare was largely ignored on the network’s premier TV shows, NBC Nightly News and Today, according to a media watchdog group.

While conservative outlets like the Drudge Report led with the story-- “Obama admin. knew millions could not keep their health insurance” -- the Nightly News gave the story by senior investigative correspondent Lisa Myers just 21 seconds. Today ignored it altogether, though found time to discuss New Jersey Gov. Chris Christie’s Halloween costume.

Myers reported that the president and his team knew that millions of Americans with health insurance would lose it once Obamacare kicked in, exactly the opposite of what the president has promised.

“Four sources deeply involved in the Affordable Care Act tell NBC NEWS that 50 to 75 percent of the 14 million consumers who buy their insurance individually can expect to receive a ‘cancellation’ letter or the equivalent over the next year because their existing policies don’t meet the standards mandated by the new healthcare law. One expert predicts that number could reach as high as 80 percent. And all say that many of those forced to buy pricier new policies will experience ‘sticker shock,’” Myers reported.

The Media Research Center blasted NBC for ignoring their own reporter’s story, one that has raised new questions about the president’s credibility.

MRC President Brent Bozell said, “NBC News, whose own reporter found the language in Obamacare proving Obama knowingly lied to the people for over three years, gave this bombshell revelation a pathetic 21 seconds of coverage on Nightly News. There was no follow-up on Today. In other words, NBC News buried their own reporter to protect Obama.

“This sends a clear message to the American people. As far as the liberal broadcast networks are concerned, when Barack Obama lies, it’s not news.”

She did get a chance to talk up her story Tuesday on CNBC’s “Squawk Box,” and MSNBC’s “The Daily Rundown.”